summaryrefslogtreecommitdiff
path: root/git-stash.sh
blob: 8b2ce9afdab6d67e8b9af5fc97a30dc6941323f2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
#!/bin/sh
# Copyright (c) 2007, Nanako Shiraishi

dashless=$(basename "$0" | sed -e 's/-/ /')
USAGE="list [<options>]
   or: $dashless show [<stash>]
   or: $dashless drop [-q|--quiet] [<stash>]
   or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
   or: $dashless branch <branchname> [<stash>]
   or: $dashless save [--patch] [-k|--[no-]keep-index] [-q|--quiet]
		      [-u|--include-untracked] [-a|--all] [<message>]
   or: $dashless [push [--patch] [-k|--[no-]keep-index] [-q|--quiet]
		       [-u|--include-untracked] [-a|--all] [-m <message>]
		       [-- <pathspec>...]]
   or: $dashless clear"

SUBDIRECTORY_OK=Yes
OPTIONS_SPEC=
START_DIR=$(pwd)
. git-sh-setup
require_work_tree
prefix=$(git rev-parse --show-prefix) || exit 1
cd_to_toplevel

TMP="$GIT_DIR/.git-stash.$$"
TMPindex=${GIT_INDEX_FILE-"$(git rev-parse --git-path index)"}.stash.$$
trap 'rm -f "$TMP-"* "$TMPindex"' 0

ref_stash=refs/stash

if git config --get-colorbool color.interactive; then
       help_color="$(git config --get-color color.interactive.help 'red bold')"
       reset_color="$(git config --get-color '' reset)"
else
       help_color=
       reset_color=
fi

no_changes () {
	git diff-index --quiet --cached HEAD --ignore-submodules -- "$@" &&
	git diff-files --quiet --ignore-submodules -- "$@" &&
	(test -z "$untracked" || test -z "$(untracked_files)")
}

untracked_files () {
	if test "$1" = "-z"
	then
		shift
		z=-z
	else
		z=
	fi
	excl_opt=--exclude-standard
	test "$untracked" = "all" && excl_opt=
	git ls-files -o $z $excl_opt -- "$@"
}

clear_stash () {
	if test $# != 0
	then
		die "$(gettext "git stash clear with parameters is unimplemented")"
	fi
	if current=$(git rev-parse --verify --quiet $ref_stash)
	then
		git update-ref -d $ref_stash $current
	fi
}

create_stash () {
	stash_msg=
	untracked=
	while test $# != 0
	do
		case "$1" in
		-m|--message)
			shift
			stash_msg=${1?"BUG: create_stash () -m requires an argument"}
			;;
		-u|--include-untracked)
			shift
			untracked=${1?"BUG: create_stash () -u requires an argument"}
			;;
		--)
			shift
			break
			;;
		esac
		shift
	done

	git update-index -q --refresh
	if no_changes "$@"
	then
		exit 0
	fi

	# state of the base commit
	if b_commit=$(git rev-parse --verify HEAD)
	then
		head=$(git rev-list --oneline -n 1 HEAD --)
	else
		die "$(gettext "You do not have the initial commit yet")"
	fi

	if branch=$(git symbolic-ref -q HEAD)
	then
		branch=${branch#refs/heads/}
	else
		branch='(no branch)'
	fi
	msg=$(printf '%s: %s' "$branch" "$head")

	# state of the index
	i_tree=$(git write-tree) &&
	i_commit=$(printf 'index on %s\n' "$msg" |
		git commit-tree $i_tree -p $b_commit) ||
		die "$(gettext "Cannot save the current index state")"

	if test -n "$untracked"
	then
		# Untracked files are stored by themselves in a parentless commit, for
		# ease of unpacking later.
		u_commit=$(
			untracked_files -z "$@" | (
				GIT_INDEX_FILE="$TMPindex" &&
				export GIT_INDEX_FILE &&
				rm -f "$TMPindex" &&
				git update-index -z --add --remove --stdin &&
				u_tree=$(git write-tree) &&
				printf 'untracked files on %s\n' "$msg" | git commit-tree $u_tree  &&
				rm -f "$TMPindex"
		) ) || die "$(gettext "Cannot save the untracked files")"

		untracked_commit_option="-p $u_commit";
	else
		untracked_commit_option=
	fi

	if test -z "$patch_mode"
	then

		# state of the working tree
		w_tree=$( (
			git read-tree --index-output="$TMPindex" -m $i_tree &&
			GIT_INDEX_FILE="$TMPindex" &&
			export GIT_INDEX_FILE &&
			git diff-index --name-only -z HEAD -- "$@" >"$TMP-stagenames" &&
			git update-index -z --add --remove --stdin <"$TMP-stagenames" &&
			git write-tree &&
			rm -f "$TMPindex"
		) ) ||
			die "$(gettext "Cannot save the current worktree state")"

	else

		rm -f "$TMP-index" &&
		GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&

		# find out what the user wants
		GIT_INDEX_FILE="$TMP-index" \
			git add--interactive --patch=stash -- "$@" &&

		# state of the working tree
		w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
		die "$(gettext "Cannot save the current worktree state")"

		git diff-tree -p HEAD $w_tree -- >"$TMP-patch" &&
		test -s "$TMP-patch" ||
		die "$(gettext "No changes selected")"

		rm -f "$TMP-index" ||
		die "$(gettext "Cannot remove temporary index (can't happen)")"

	fi

	# create the stash
	if test -z "$stash_msg"
	then
		stash_msg=$(printf 'WIP on %s' "$msg")
	else
		stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
	fi
	w_commit=$(printf '%s\n' "$stash_msg" |
	git commit-tree $w_tree -p $b_commit -p $i_commit $untracked_commit_option) ||
	die "$(gettext "Cannot record working tree state")"
}

store_stash () {
	while test $# != 0
	do
		case "$1" in
		-m|--message)
			shift
			stash_msg="$1"
			;;
		-q|--quiet)
			quiet=t
			;;
		*)
			break
			;;
		esac
		shift
	done
	test $# = 1 ||
	die "$(eval_gettext "\"$dashless store\" requires one <commit> argument")"

	w_commit="$1"
	if test -z "$stash_msg"
	then
		stash_msg="Created via \"git stash store\"."
	fi

	git update-ref --create-reflog -m "$stash_msg" $ref_stash $w_commit
	ret=$?
	test $ret != 0 && test -z "$quiet" &&
	die "$(eval_gettext "Cannot update \$ref_stash with \$w_commit")"
	return $ret
}

push_stash () {
	keep_index=
	patch_mode=
	untracked=
	stash_msg=
	while test $# != 0
	do
		case "$1" in
		-k|--keep-index)
			keep_index=t
			;;
		--no-keep-index)
			keep_index=n
			;;
		-p|--patch)
			patch_mode=t
			# only default to keep if we don't already have an override
			test -z "$keep_index" && keep_index=t
			;;
		-q|--quiet)
			GIT_QUIET=t
			;;
		-u|--include-untracked)
			untracked=untracked
			;;
		-a|--all)
			untracked=all
			;;
		-m|--message)
			shift
			test -z ${1+x} && usage
			stash_msg=$1
			;;
		--help)
			show_help
			;;
		--)
			shift
			break
			;;
		-*)
			option="$1"
			# TRANSLATORS: $option is an invalid option, like
			# `--blah-blah'. The 7 spaces at the beginning of the
			# second line correspond to "error: ". So you should line
			# up the second line with however many characters the
			# translation of "error: " takes in your language. E.g. in
			# English this is:
			#
			#    $ git stash save --blah-blah 2>&1 | head -n 2
			#    error: unknown option for 'stash save': --blah-blah
			#           To provide a message, use git stash save -- '--blah-blah'
			eval_gettextln "error: unknown option for 'stash save': \$option
       To provide a message, use git stash save -- '\$option'"
			usage
			;;
		*)
			break
			;;
		esac
		shift
	done

	eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"

	if test -n "$patch_mode" && test -n "$untracked"
	then
		die "$(gettext "Can't use --patch and --include-untracked or --all at the same time")"
	fi

	test -n "$untracked" || git ls-files --error-unmatch -- "$@" >/dev/null || exit 1

	git update-index -q --refresh
	if no_changes "$@"
	then
		say "$(gettext "No local changes to save")"
		exit 0
	fi

	git reflog exists $ref_stash ||
		clear_stash || die "$(gettext "Cannot initialize stash")"

	create_stash -m "$stash_msg" -u "$untracked" -- "$@"
	store_stash -m "$stash_msg" -q $w_commit ||
	die "$(gettext "Cannot save the current status")"
	say "$(eval_gettext "Saved working directory and index state \$stash_msg")"

	if test -z "$patch_mode"
	then
		test "$untracked" = "all" && CLEAN_X_OPTION=-x || CLEAN_X_OPTION=
		if test -n "$untracked"
		then
			git clean --force --quiet -d $CLEAN_X_OPTION -- "$@"
		fi

		if test $# != 0
		then
			git reset -q -- "$@"
			git ls-files -z --modified -- "$@" |
			git checkout-index -z --force --stdin
			git clean --force -q -d -- "$@"
		else
			git reset --hard -q
		fi

		if test "$keep_index" = "t" && test -n "$i_tree"
		then
			git read-tree --reset $i_tree
			git ls-files -z --modified -- "$@" |
			git checkout-index -z --force --stdin
		fi
	else
		git apply -R < "$TMP-patch" ||
		die "$(gettext "Cannot remove worktree changes")"

		if test "$keep_index" != "t"
		then
			git reset -q -- "$@"
		fi
	fi
}

save_stash () {
	push_options=
	while test $# != 0
	do
		case "$1" in
		--)
			shift
			break
			;;
		-*)
			# pass all options through to push_stash
			push_options="$push_options $1"
			;;
		*)
			break
			;;
		esac
		shift
	done

	stash_msg="$*"

	if test -z "$stash_msg"
	then
		push_stash $push_options
	else
		push_stash $push_options -m "$stash_msg"
	fi
}

have_stash () {
	git rev-parse --verify --quiet $ref_stash >/dev/null
}

list_stash () {
	have_stash || return 0
	git log --format="%gd: %gs" -g --first-parent -m "$@" $ref_stash --
}

show_stash () {
	ALLOW_UNKNOWN_FLAGS=t
	assert_stash_like "$@"

	if test -z "$FLAGS"
	then
		if test "$(git config --bool stash.showStat || echo true)" = "true"
		then
			FLAGS=--stat
		fi

		if test "$(git config --bool stash.showPatch || echo false)" = "true"
		then
			FLAGS=${FLAGS}${FLAGS:+ }-p
		fi

		if test -z "$FLAGS"
		then
			return 0
		fi
	fi

	git diff ${FLAGS} $b_commit $w_commit
}

show_help () {
	exec git help stash
	exit 1
}

#
# Parses the remaining options looking for flags and
# at most one revision defaulting to ${ref_stash}@{0}
# if none found.
#
# Derives related tree and commit objects from the
# revision, if one is found.
#
# stash records the work tree, and is a merge between the
# base commit (first parent) and the index tree (second parent).
#
#   REV is set to the symbolic version of the specified stash-like commit
#   IS_STASH_LIKE is non-blank if ${REV} looks like a stash
#   IS_STASH_REF is non-blank if the ${REV} looks like a stash ref
#   s is set to the SHA1 of the stash commit
#   w_commit is set to the commit containing the working tree
#   b_commit is set to the base commit
#   i_commit is set to the commit containing the index tree
#   u_commit is set to the commit containing the untracked files tree
#   w_tree is set to the working tree
#   b_tree is set to the base tree
#   i_tree is set to the index tree
#   u_tree is set to the untracked files tree
#
#   GIT_QUIET is set to t if -q is specified
#   INDEX_OPTION is set to --index if --index is specified.
#   FLAGS is set to the remaining flags (if allowed)
#
# dies if:
#   * too many revisions specified
#   * no revision is specified and there is no stash stack
#   * a revision is specified which cannot be resolve to a SHA1
#   * a non-existent stash reference is specified
#   * unknown flags were set and ALLOW_UNKNOWN_FLAGS is not "t"
#

parse_flags_and_rev()
{
	test "$PARSE_CACHE" = "$*" && return 0 # optimisation
	PARSE_CACHE="$*"

	IS_STASH_LIKE=
	IS_STASH_REF=
	INDEX_OPTION=
	s=
	w_commit=
	b_commit=
	i_commit=
	u_commit=
	w_tree=
	b_tree=
	i_tree=
	u_tree=

	FLAGS=
	REV=
	for opt
	do
		case "$opt" in
			-q|--quiet)
				GIT_QUIET=-t
			;;
			--index)
				INDEX_OPTION=--index
			;;
			--help)
				show_help
			;;
			-*)
				test "$ALLOW_UNKNOWN_FLAGS" = t ||
					die "$(eval_gettext "unknown option: \$opt")"
				FLAGS="${FLAGS}${FLAGS:+ }$opt"
			;;
			*)
				REV="${REV}${REV:+ }'$opt'"
			;;
		esac
	done

	eval set -- $REV

	case $# in
		0)
			have_stash || die "$(gettext "No stash entries found.")"
			set -- ${ref_stash}@{0}
		;;
		1)
			:
		;;
		*)
			die "$(eval_gettext "Too many revisions specified: \$REV")"
		;;
	esac

	case "$1" in
		*[!0-9]*)
			:
		;;
		*)
			set -- "${ref_stash}@{$1}"
		;;
	esac

	REV=$(git rev-parse --symbolic --verify --quiet "$1") || {
		reference="$1"
		die "$(eval_gettext "\$reference is not a valid reference")"
	}

	i_commit=$(git rev-parse --verify --quiet "$REV^2") &&
	set -- $(git rev-parse "$REV" "$REV^1" "$REV:" "$REV^1:" "$REV^2:" 2>/dev/null) &&
	s=$1 &&
	w_commit=$1 &&
	b_commit=$2 &&
	w_tree=$3 &&
	b_tree=$4 &&
	i_tree=$5 &&
	IS_STASH_LIKE=t &&
	test "$ref_stash" = "$(git rev-parse --symbolic-full-name "${REV%@*}")" &&
	IS_STASH_REF=t

	u_commit=$(git rev-parse --verify --quiet "$REV^3") &&
	u_tree=$(git rev-parse "$REV^3:" 2>/dev/null)
}

is_stash_like()
{
	parse_flags_and_rev "$@"
	test -n "$IS_STASH_LIKE"
}

assert_stash_like() {
	is_stash_like "$@" || {
		args="$*"
		die "$(eval_gettext "'\$args' is not a stash-like commit")"
	}
}

is_stash_ref() {
	is_stash_like "$@" && test -n "$IS_STASH_REF"
}

assert_stash_ref() {
	is_stash_ref "$@" || {
		args="$*"
		die "$(eval_gettext "'\$args' is not a stash reference")"
	}
}

apply_stash () {

	assert_stash_like "$@"

	git update-index -q --refresh || die "$(gettext "unable to refresh index")"

	# current index state
	c_tree=$(git write-tree) ||
		die "$(gettext "Cannot apply a stash in the middle of a merge")"

	unstashed_index_tree=
	if test -n "$INDEX_OPTION" && test "$b_tree" != "$i_tree" &&
			test "$c_tree" != "$i_tree"
	then
		git diff-tree --binary $s^2^..$s^2 | git apply --cached
		test $? -ne 0 &&
			die "$(gettext "Conflicts in index. Try without --index.")"
		unstashed_index_tree=$(git write-tree) ||
			die "$(gettext "Could not save index tree")"
		git reset
	fi

	if test -n "$u_tree"
	then
		GIT_INDEX_FILE="$TMPindex" git read-tree "$u_tree" &&
		GIT_INDEX_FILE="$TMPindex" git checkout-index --all &&
		rm -f "$TMPindex" ||
		die "$(gettext "Could not restore untracked files from stash entry")"
	fi

	eval "
		GITHEAD_$w_tree='Stashed changes' &&
		GITHEAD_$c_tree='Updated upstream' &&
		GITHEAD_$b_tree='Version stash was based on' &&
		export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
	"

	if test -n "$GIT_QUIET"
	then
		GIT_MERGE_VERBOSITY=0 && export GIT_MERGE_VERBOSITY
	fi
	if git merge-recursive $b_tree -- $c_tree $w_tree
	then
		# No conflict
		if test -n "$unstashed_index_tree"
		then
			git read-tree "$unstashed_index_tree"
		else
			a="$TMP-added" &&
			git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
			git read-tree --reset $c_tree &&
			git update-index --add --stdin <"$a" ||
				die "$(gettext "Cannot unstage modified files")"
			rm -f "$a"
		fi
		squelch=
		if test -n "$GIT_QUIET"
		then
			squelch='>/dev/null 2>&1'
		fi
		(cd "$START_DIR" && eval "git status $squelch") || :
	else
		# Merge conflict; keep the exit status from merge-recursive
		status=$?
		git rerere
		if test -n "$INDEX_OPTION"
		then
			gettextln "Index was not unstashed." >&2
		fi
		exit $status
	fi
}

pop_stash() {
	assert_stash_ref "$@"

	if apply_stash "$@"
	then
		drop_stash "$@"
	else
		status=$?
		say "$(gettext "The stash entry is kept in case you need it again.")"
		exit $status
	fi
}

drop_stash () {
	assert_stash_ref "$@"

	git reflog delete --updateref --rewrite "${REV}" &&
		say "$(eval_gettext "Dropped \${REV} (\$s)")" ||
		die "$(eval_gettext "\${REV}: Could not drop stash entry")"

	# clear_stash if we just dropped the last stash entry
	git rev-parse --verify --quiet "$ref_stash@{0}" >/dev/null ||
	clear_stash
}

apply_to_branch () {
	test -n "$1" || die "$(gettext "No branch name specified")"
	branch=$1
	shift 1

	set -- --index "$@"
	assert_stash_like "$@"

	git checkout -b $branch $REV^ &&
	apply_stash "$@" && {
		test -z "$IS_STASH_REF" || drop_stash "$@"
	}
}

test "$1" = "-p" && set "push" "$@"

PARSE_CACHE='--not-parsed'
# The default command is "push" if nothing but options are given
seen_non_option=
for opt
do
	case "$opt" in
	--) break ;;
	-*) ;;
	*) seen_non_option=t; break ;;
	esac
done

test -n "$seen_non_option" || set "push" "$@"

# Main command set
case "$1" in
list)
	shift
	list_stash "$@"
	;;
show)
	shift
	show_stash "$@"
	;;
save)
	shift
	save_stash "$@"
	;;
push)
	shift
	push_stash "$@"
	;;
apply)
	shift
	apply_stash "$@"
	;;
clear)
	shift
	clear_stash "$@"
	;;
create)
	shift
	create_stash -m "$*" && echo "$w_commit"
	;;
store)
	shift
	store_stash "$@"
	;;
drop)
	shift
	drop_stash "$@"
	;;
pop)
	shift
	pop_stash "$@"
	;;
branch)
	shift
	apply_to_branch "$@"
	;;
*)
	case $# in
	0)
		push_stash &&
		say "$(gettext "(To restore them type \"git stash apply\")")"
		;;
	*)
		usage
	esac
	;;
esac